Monitoring the aeration efficiency and carbon footprint of a medium-sized WWTP: experimental results on oxidation tank and aerobic digester
| Autor: | Rosanna Brienza, Marianna Caivano, Ignazio Marcello Mancini, Giacomo Bellandi, Salvatore Masi, Simona Panariello, Donatella Caniani, Riccardo Gori |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
0208 environmental biotechnology Nitrous Oxide Aerobic treatment system 02 engineering and technology Biological Oxygen Demand Analysis 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Bioreactors Ammonium Compounds Environmental Chemistry Aerobic digestion Waste Management and Disposal Nitrites Carbon Footprint 0105 earth and related environmental sciences Water Science and Technology Air Pollutants Nitrates Waste management business.industry Environmental engineering General Medicine Carbon Dioxide 020801 environmental engineering Activated sludge Italy Wastewater Greenhouse gas Carbon footprint Aeration business Oxidation-Reduction Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Technology. 38:629-638 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2016.1205150 |
| Popis: | The efficiency of aeration systems should be monitored to guarantee suitable biological processes. Among the available tools for evaluating the aeration efficiency, the off-gas method is one of the most useful. Increasing interest towards reducing greenhouse gas (GHG) emissions from biological processes has resulted in researchers using this method to quantify N2O and CO2 concentrations in the off-gas. Experimental measurements of direct GHG emissions from aerobic digesters (AeDs) are not available in literature yet. In this study, the floating hood technique was used for the first time to monitor AeDs. The floating hood technique was used to evaluate oxygen transfer rates in an activated sludge (AS) tank of a medium-sized municipal wastewater treatment plant located in Italy. Very low values of oxygen transfer efficiency were found, confirming that small-to-medium-sized plants are often scarcely monitored and wrongly managed. Average CO2 and N2O emissions from the AS tank were 0.14 kgCO2/kgbCOD a... |
| Databáze: | OpenAIRE |
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